Update README.md

jfullstackdev · web-flow · commit 5b01a8c97666 · 2022-04-22T00:01:41.000+08:00
diff --git a/README.md b/README.md
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 # Blinking LED Arduino
+
+*`updated 21 April 2022`*
+
 This is a blinking LED activity as the intro for 
 Arduino Code programming.
 
